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Cheap flights from London Heathrow Airport to Allentown from £464

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
6 Aug — 13 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Allentown

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Allentown
Explore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 July 2026.

Thu 15/1017:05
LHR
-
ABE
2 stops28h 30m
Finnair
Thu 22/1018:20
ABE
-
LHR
1 stop11h 30m
Finnair
Deal found 7/7£692
Thu 15/1013:25
LHR
-
ABE
1 stop32h 50m
Virgin Atlantic
Thu 22/1018:00
ABE
-
LHR
1 stop14h 15m
Virgin Atlantic
Deal found 7/7£727
Thu 15/1010:45
LHR
-
ABE
2 stops16h 44m
Delta
Thu 22/1013:00
ABE
-
LHR
2 stops19h 05m
Delta
Deal found 7/7£750
Thu 17/908:45
LHR
-
ABE
2 stops29h 54m
United Airlines
Mon 21/910:32
ABE
-
LHR
1 stop20h 23m
United Airlines
Deal found 2/7£770
Sat 12/906:55
LHR
-
ABE
2 stops19h 05m
United Airlines
Sun 13/917:36
ABE
-
LHR
2 stops22h 04m
United Airlines
Deal found 7/7£774
Thu 24/1208:55
LHR
-
ABE
1 stop18h 51m
Virgin Atlantic
Fri 25/1217:40
ABE
-
LHR
1 stop31h 45m
Virgin Atlantic
Deal found 3/7£857
Fri 21/808:40
LHR
-
ABE
2 stops18h 43m
Virgin Atlantic
Fri 28/813:10
ABE
-
LHR
1 stop12h 15m
Virgin Atlantic
Deal found 7/7£902

Find flight deals from Heathrow to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Allentown (ABE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7 July 2026.

Round-trip from

£692

One-way from

£464
Finnair
  • Finnair
  • 15/10-22/10
  • 3 total stops
  • 40h 00m total
  • London to Allentown
Search Deals
Delta
  • Delta
  • 1/12
  • 1 total stop
  • 13h 17m total
  • London to Allentown
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Allentown that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 July 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 17/9

08:45-09:39

2 stops29h 54m

Allentown-Bethlehem

Mon 21/9

17:36-20:40

2 stops22h 04m

£770

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 12/9

06:55-21:00

2 stops19h 05m

Allentown-Bethlehem

Sun 13/9

17:36-06:45

1 stop32h 09m

£774
Fastest return journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 26/8

06:50-17:00

2 stops15h 10m

Allentown-Bethlehem

Mon 31/8

17:36-11:55

1 stop13h 19m

£906

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 21/8

09:55-22:23

2 stops17h 28m

Allentown-Bethlehem

Fri 28/8

06:16-07:10

2 stops19h 54m

£914

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 27/8

08:45-21:00

2 stops17h 15m

Allentown-Bethlehem

Mon 31/8

17:36-11:55

1 stop13h 19m

£932
Cheapest one-way

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 1/12

08:55-17:12

1 stop13h 17m

£464
Fastest single journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 13/10

09:20-17:15

1 stop12h 55m

£485

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 26/8

09:20-17:23

1 stop13h 03m

£485

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 20/10

09:20-17:15

1 stop12h 55m

£485

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 28/8

09:20-17:19

1 stop12h 59m

£526

Flights are sorted by cheapest return flights first.

Deals found on 6/7

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from Heathrow to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Allentown. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Allentown from London Heathrow?

    Most people fly into Allentown-Bethlehem (ABE) if they book a flight to Allentown from London Heathrow. On average, Allentown-Bethlehem has 0 inbound flights from London Heathrow per day from 0 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

  • How long is the flight from London Heathrow Airport to Allentown?

    Airlines like United Airlines fly from London Heathrow Airport to Allentown in about 29h 54m. The time it takes to get you to your destination can typically vary by up to . The distance between London Heathrow Airport and Allentown is about 3507 mi.

  • Can I find deals for flights from Heathrow to Allentown that include hotel bookings?

    Yes. In addition to deals on Heathrow to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Allentown?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Allentown.

  • Can I find deals for business class flights from Heathrow to Allentown?

    Yes. Cheapflights offers flight deals from Heathrow to Allentown by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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How does Cheapflights help users find flights from Heathrow to Allentown?

Deals for Heathrow to Allentown flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Allentown?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Allentown for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Allentown with no change fees?

Need flexible booking options for your flight to Allentown from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Allentown become cheaper?

Yes! Start tracking prices for Heathrow to Allentown flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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